05/21←  2025-05-22 CWB twsfc map  →05/23

2025-05-22 00 UTC	2025-05-22 03 UTC
2025-05-22 06 UTC	2025-05-22 09 UTC
2025-05-22 12 UTC	2025-05-22 15 UTC
2025-05-22 18 UTC	2025-05-22 21 UTC